KR20180010861A - Method of manufacturing fishing weight using hard metal scrap and fishing weight therefrom - Google Patents

Abstract

The present invention relates to a manufacturing method of a fishing weight using a cemented carbide waste scrap, and a fishing weight manufactured thereby, which is configured to pulverize waste scrap powder of 75 to 99 wt% of a cemented carbide and 1-25 wt% of a binder component into a predetermined particle size, roll and mix raw material powder to have a predetermined composition, pressurize and mold the mixed raw material powder, and sinter the resultant powder at 1400 C for 60 to 100 minutes in a vacuum state. The fishing weight of the present invention can reduce manufacturing costs by using a material obtained by re-processing a cemented carbide waste scrap, and can solve environmental pollution problems and produce a large amount of fishing weights having appropriate specific gravity.

Description

METHOD OF MANUFACTURING FISHING WEIGHT USING HARD METAL SCRAP AND FISHING WEIGHT THEREFROM BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method for manufacturing a fishing weights, and more particularly, to a method for manufacturing a fishing weights using a cemented scrap scrap capable of mass production at low cost and reducing water pollution.

The present invention also relates to a fishing tack made using cemented carbide scrap.

Generally, the fishing gear used for fishing is mostly made of lead. The reason is that lead is low in material cost, easy to manufacture, chemically stable due to corrosion to water, and large in proportion. However, lead fishing lures (or bongdol) are lost during fishing, and they are worn or eroded due to collision with seaweed, sand, gravel or rock, causing lead to elute, causing pollution in water, and lead toxicity is a problem. In addition, there is a problem that the lead component is volatilized in the manufacturing process of the fishing rod containing lead as a main component, thereby contaminating the atmosphere and bringing into contact with the skin of the worker and harmful to the human body. Therefore, in the United Kingdom, Canada, and the United States, the use of lead-based fishing weights is prohibited by law.

Therefore, fishing of steel, brass or bismuth material has been developed, but its specific gravity is smaller than that of lead, its value is higher and its utilization is lower. The recently developed stainless steel fishing tackle has a higher weight than lead but is expensive and has yet to undergo environmental impact assessment. On the other hand, fishing with high density resin was further developed, which is advantageous in terms of price and non-toxicity.

Accordingly, various technologies have been proposed that can solve environmental pollution and harmfulness to the human body due to toxicity of a fishing rod made of lead.

For example, Japanese Patent Application Laid-Open No. 2002-0053051 (a fishing-use balloon composition, a method for producing the same, and a fishing-use balloon formed by the method) comprises 9096 wt% of tungsten powder pulverized into 0.825 탆, 36 wt% A method for manufacturing a fishing rod for fishing between rotating rubber rollers by putting a raw material into a blend of weight% and a boll. Utility Model No. 20-0285728 (artificial bait and sinker for fishing using tungsten) discloses a structure for artificial bait for fishing in which a needle is attached to a molded product in which resin powder for tungsten powder and binder is injected. These technologies use tungsten as a material, which can solve the toxicity problem of lead, but it is costly to manufacture.

 On the other hand, Japanese Patent No. 10-0399879 (a method for manufacturing fishing rods and fishing nets using tungsten sintered scrap powder) is a method in which 90-96 wt% of tungsten sintered scrap powder having a size of 50-100 μm and 4-10 wt% A method for manufacturing a fishing tackle is disclosed which comprises molding and adding pigments of various colors. This is a technique that can reduce the manufacturing cost by using the tungsten sintered scrap powder, but the manufacturing process is complicated as a method of using the resin and the pigment.

Therefore, it is required to develop a technique for manufacturing a fishing tackle capable of reducing environmental pollution and mass production at a low cost.

DISCLOSURE Technical Problem The present invention has been made in order to solve the problems of the prior art as described above. According to one aspect of the present invention, a manufacturing method of a cemented carbide scrap of the present invention can reduce manufacturing cost by using recycled material, And to provide a method for manufacturing fishing weights.

According to another aspect of the present invention, there is provided a fishing tackle manufactured using a cemented carbide scrap having an appropriate specific gravity while reducing manufacturing costs.

According to an aspect of the present invention, there is provided a method of manufacturing a fishing rod using a cemented carbide waste scrap, comprising the steps of: preparing 75-99 wt% of carbide carbide and 1-25 wt% Crushing the mixture to a predetermined particle size and kneading the mixture to have a predetermined composition to produce a raw material powder, press-molding the kneaded raw material powder, and sintering the mixture at 1400 캜 for 60 to 100 minutes in a vacuum atmosphere.

The carbide carbide may be tungsten carbide (WC) powder, and the binder component may be at least one of Co, Ni, and Fe.

The carbide carbide may further include any one of TiC, TaC, NbC, and Cr3C2, and the amount thereof may be 2-4 wt% or less.

A method for manufacturing a fishing rod using a cemented carbide scrap according to another embodiment of the present invention comprises pulverizing a waste scrap processing powder having 60 to 99% by weight of tungsten (W) and 1 to 40% by weight of a binder component to a predetermined particle size Kneading the mixture to have a predetermined composition to prepare a raw material powder, press-molding the kneaded raw material powder, and then sintering the mixture at 1500 DEG C for 60-100 minutes in a reducing atmosphere to produce a fishing weights.

Here, in the forming step, the raw material powder is put between the upper punch and the lower punch inserted into the mold, and the core pin is inserted perpendicularly to the operating direction of the upper punch and the lower punch so as to form an asymmetric hole penetrating the fishing line, The punch and the lower punch can be operated.

The present invention can be post-treated by applying a glass bead or pigment to the surface of the sintered fishing weights in order to impart luminosity thereto.

The present invention is characterized by a fishing weight manufactured according to the above-described manufacturing method.

According to the present invention having the above-described structure, it is possible to reduce the production cost by using the material obtained by reprocessing the cemented waste scrap, thereby solving the environmental pollution problem and mass-producing the fishing weights having appropriate specific gravity.

The invention will be more clearly understood with reference to the accompanying drawings,
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a manufacturing process of a fishing tackle using a cemented carbide scrap according to an embodiment of the present invention.
2 is a schematic cross-sectional view illustrating a forming process of a fishing weights according to an embodiment of the present invention.
3 is a photograph showing a fishing weights manufactured according to an embodiment of the present invention.

Hereinafter, a method for manufacturing a fishing weights using the cemented scrap of the present invention will be described in detail with reference to the accompanying drawings.

In general, the general composition of cemented carbide is composed of tungsten carbide (WC) and Co. WC is used in the production of cemented carbide tool with Co and alloy which have a lower specific gravity than tungsten but have high hardness and good bonding properties. When producing fishing weights with WC-Co cemented carbide, since the corrosion resistance of Co is not good, it is possible to solve the corrosion problem by adding some Cr or replacing Co with Ni.

Generally, since the cemented carbide is manufactured by the powder metallurgy method, the composition of Ni which is in a bonding phase with WC can be changed variously, and thus the weight range of the cemented carbide can be changed greatly.

Here, the specific gravity of the cemented carbide commonly used ranges from 13 to 15, which is suitable for use as a fishing rod because it has a specific gravity of about 1.3 times or more as compared with a lead alloy having a specific gravity of 11.3 or less.

The present invention simultaneously obtains the two technical features of reducing the manufacturing cost by using the recycled material of the scrap of the cemented carbide material and securing that it is made of the pure carbide powder and that the fishing weight is not largely behind the specific gravity It is.

The cemented carbide refers to an alloy of complex structure in which carbides of Group 4B, 5B and 6B metals (W, Ti, Ta, Nb, Cr, etc.) are combined with Fe, Co and Ni, which are iron family elements. The raw material of the carbide is used as a powder, and Fe, Co, and Ni metal powder are added to the powder as a binder. The powder metallurgy process is to produce an alloy powder having a desired composition and then to make a desired shape by press molding or the like by pressing, and sintering the alloy powder. It has an advantage that a complicated shape can be simply formed by using a raw material having a high melting point, such as carbide.

The scrap powder of a cemented carbide according to an embodiment of the present invention is an alloy in which at least one of the above-mentioned carbides is used as a first raw material and at least one of three iron family elements is combined as a second raw material (binder) The composition of the alloy depends on the composition of the alloy, and the specific gravity and hardness of the alloy depend on the kind of the carbide phase and the amount of the bond phase.

In one embodiment of the present invention, the target weight of the fishing spool is aimed at a specific gravity of the fishing sprocket made of the conventional lead as a raw material, that is, a specific gravity larger than the specific gravity (11.3) of the lead, for example, 12. Generally, since the specific gravity of the fishing spindle is required to be large, the WC having the largest specific gravity among the carbides is preferable as the first raw material, and the second raw material is preferably Co having the WC and binding characteristics.

Generally, in the case of WC-Co cemented carbide, the Co content of the commercial alloy does not exceed 30% (inorganic fraction). When the amount of Co is large, it causes deformation during sintering and it becomes difficult to obtain an accurate shape. Therefore, the amount of Co is preferably within 15%, and it is necessary to lower the bonding phase to increase the specific gravity of the final product. In the cemented carbide, an alloy having a bonding phase of 5% or more is used because a sufficient sintered body without internal porosity can be obtained and a sufficient strength can be obtained when the fraction of the bonded phase is 5% (wt%) or more.

In the fishing weights according to the present invention, however, the hardness and strength characteristics that are important in general cemented carbide are not a matter of interest, but require a large specific gravity. Therefore, as the content of WC having a high specific gravity is high and the amount of Fe, Co, and Ni To be adjusted so as to have appropriate components so that the specific gravity is large and the material cost can be reduced.

Generally, it is advantageous to use WC and Co, Ni or Fe because of the high cost of TaC especially when using Virgin powder.

In addition, because the fishing weights are used in water, such as seawater or fresh water, corrosion resistance to water is required. For this purpose, it is necessary to add Ni to Co which is not so good in corrosion resistance, and addition of Cr3C2 is also preferable because it increases the corrosion resistance on the bonding phase.

The composition of the recycled powder of the recycled pulverulent used in the present invention (usually called reclaim powder) varies depending on the type of pulverized cemented carbide. In order to obtain desired specific gravity of the various types of reprocessed powder Adjust the composition of the ingredients.

According to an embodiment of the present invention, as shown in Fig. 1, the waste scrap reprocessed powder having 60 to 99 wt% of carbide carbide and 1-40 wt% of the binder component is pulverized to a predetermined particle size (step S1) , And kneaded to have a predetermined composition to produce a raw material powder (step S2). The raw material powder having undergone the component adjustment is pressure-molded so as to obtain a product having a specific gravity of 12 or more (step S3).

The recycled powder of waste scrap used in the present invention may be tungsten carbide (WC) powder or tungsten (W) powder, and the binder component may be at least one of Co, Ni, and Fe. However, as a modification of the present invention, the carbide carbide may further contain 2-4 wt% or less of any one of TiC, TaC, NbC, and Cr3C2.

Here, the forming step S3 will be described in detail with reference to Figs.

The fishing weights according to the present invention are asymmetric elliptical (Oval) shapes. The raw material powder 18 is put between the upper punch 12 and the lower punch 14 inserted in the mold 10 into the space 16 having a shape corresponding to the fishing weight. The core pin 22 is inserted into the groove 10a of the mold 10 from the upper punch 12 and the lower punch 14 (not shown) so as to form a hole 20 through which a fishing line (not shown) ) Perpendicular to the direction of operation. Subsequently, the upper punch 12 and the lower punch 14 are sequentially operated with each other to produce a formed body having a shape corresponding to the fishing weights.

In the present invention, asymmetrical holes are formed simultaneously with the pressing of the raw material powder by using a forming press, so compared with the conventional method in which a hole is formed in a generally formed fishing rod later by machining, the working time and accuracy are remarkably improved .

Next, when the molded body is put in a sintering furnace and the WC powder is sintered at 1400 ° C in a vacuum atmosphere and W powder at 1500 ° C for 60-100 minutes in a reducing atmosphere (S4) do.

In the meantime, a glass bead or pigment may be added in order to impart luminescence to the surface of the sintered fishing weights.

In other words, the typical fishing weights are diverse and colorful and colorful. The reason why the color of the surface of the fishing weights is gorgeous is that it does not attract the fish by using the reflex action of light.

The color of the cemented carbide is gray, which represents a typical metal color, and a post-treatment for surface treatment such as application of a light-emitting paint is carried out in order to impart a commercial property and luminous property (step S5). Further, it may include a method of further utilizing a luminous component.

Hereinafter, examples and comparative examples of the present invention will be described.

Example 1

WC (residual weight%) - 8% Co + 3% Nii - 1% Cr was used as the cemented carbide powder. The waste cemented carbide is powdered by the hot-dip zinc method. The raw material powder was formed into a pressing press and sintered at 1400 캜 for 60 minutes in a vacuum atmosphere to produce a fishing weights. The weight of the obtained fishing weights was 14.1-14.2.

Example 2

WC was added to the pure powder for the purpose of controlling the specific gravity of the cemented carbide powder having the composition of WC (residual weight%) - 4% Co-1.5% Ni-0.5% Molding under the same conditions. And sintered. The weight of the obtained fishing weights was 14.8-14.9.

Example 3

W (remaining weight%) - 3% Fe-2% Ni. Tungsten (W) powder (specific gravity 19.3), which is one of the most heavy metals among the metal elements, was used and Fe and Ni were used as the bonding phase, and then sintered at 1500 ° C. for 60 minutes in a reducing atmosphere. The specific gravity of the obtained fishing weights was 18.0-18.1.

Comparative Example 1

WC (residual weight%) - 1% Co-2% Ni-0.2% Cr pure powder was used. Conventional cemented carbide manufacturing methods are used, but in this case, the particle size of the WC is limited because of the small fraction of the bonded phase. The raw material of 0.5-0.8 μm size is used and the ball milling time is lengthened. The weight of the obtained fishing weights is 15.20-15.30, which is 1.3 times larger than the specific gravity of lead.

Comparative Example 2

 WC (balance weight%) - 1% Co - 1% Ni - 4% Fe - 0.3% Cr powder was used. As a method for lowering the manufacturing cost, it is a composition in which the fraction of Fe in the bonded phase is increased. The weight of the obtained fishing weights is 14.8-14.9.

Comparative Example 3

WC (residual weight%) - 0.5% Co-0.5% Cr pure powder was used. It is the composition of the alloy which minimizes the metal bond phase to realize the largest specific gravity in the carbide-based cemented carbide. In this case, the WC particle size was 0.5 μm, the ball mill time was increased, and the sintered body was sintered at 1500 ° C. for 100 minutes so that a solid body and a sintered body could obtain an alloy. The weight of the obtained fishing weights is 15.4-15.5.

The components (weight%) and specific gravity of Examples and Comparative Examples of the present invention are summarized in Table 1.

WC Co Ni Cr Fe   importance Example One Remainder WC 8 3 One - 14.1-14.2 Example 2 Remainder WC 4 1.5 0.5 - 14.8-14.9 Example 3 The remainder W - 2 - 3 18.0-18.1 Comparative Example 4 Remainder WC One 2 2 - 15.2-15.3 Comparative Example 5 Remainder WC One One 0.3 4 14.8-14.9 Comparative Example 6 Remainder WC 0.5 - 0.5 - 15.4-15.5

As shown in Table 1, the fishing weights using the WC powder reprocessed from the waste scraps according to Example 1-2 of the present invention had a specific gravity of about 14, and the fishing according to Example 3 using the W- It can be seen that the weight of the weights is about 18 and the fishing weights exceeding the target specific gravity of 12 can be obtained and are suitable as a fishing weights.

Comparative Example 4-6 shows an example of manufacturing a fishing weights using pure WC powder. Although the weight of the fishing weights obtained is larger than that of the embodiment of the present invention, it is understood that the burden of the material cost is large.

In general, the size and the weight of the fishing weights vary depending on the application of the fishing rod. In the fishing weights of the present invention, powder metallurgy is used. Therefore, the design of the press machine and the mold used in the forming step is appropriately changed, By varying the composition and the shrinkage ratio, it is possible to produce a fishing tackle product having various sizes and specific gravity.

The above description describes preferred embodiments of the present invention, and the present invention is not limited thereto. It should be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: mold 12,14: upper and lower punch
20: core pin 22: core pin

Claims (7)

75 to 99% by weight of carbide carbide and 1-25% by weight of binder component are pulverized to a predetermined particle size,
Kneaded to have a predetermined composition to prepare a raw material powder,
The kneaded raw material powder is pressure-molded,
And sintering at 1400 DEG C for 60 to 100 minutes in a vacuum atmosphere. The method according to claim 1,
Wherein the carbide carbide is a tungsten carbide (WC) powder and the binder component is at least one of Co, Ni, and Fe. 3. The method of claim 2,
Wherein the carbide carbide further comprises any one of TiC, TaC, NbC, and Cr3C2, and the amount of the carbide is 2-4 wt% or less. 60 to 99% by weight of tungsten (W) and 1 to 40% by weight of a binder component are pulverized to a predetermined particle size,
Kneaded to have a predetermined composition to prepare a raw material powder,
The kneaded raw material powder is pressure-molded,
Wherein the sintering is performed at 1500 DEG C for 60 to 100 minutes in a reducing atmosphere. The method according to claim 1,
In the forming step, the raw material powder is inserted between the upper punch and the lower punch inserted into the mold, and the core pin is inserted perpendicularly to the operating direction of the upper punch and the lower punch so as to form an asymmetric hole through the fishing line, And the lower punch is operated. The method according to claim 1,
Further comprising the step of applying a post-treatment to apply a glass bead or pigment to the surface of the sintered fishing weights in order to impart luminescence to the surface of the sintered fishing weights. A fishing tackle produced according to the method of any one of claims 1 to 6.

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